L-theanine and stress

stress suntheanine

March 18, 2015

L-theanine and stress

Can consumption of L-theanine help with stress reduction?

Can L-theanine help reduce stress? According to clinical research, 50-200 mg of Suntheanine, an L-theanine supplement made by Taiyo, stimulates activity in the brain known as alpha waves, which are associated with a relaxed but alert mental state. Also supporting a link between consumption of L-theanine and stress reduction is a study in the Journal of Biological Psychology.

The researchers found that L-theanine intake resulted in lower heart rate and salivary immunoglobulin A (s-lgA) responses in participants involved in an acute stress task relative to the placebo group. The study analysis found that these response reductions were likely due to reductions in sympathetic nervous activation. “Thus, it was suggested that oral intake of L-theanine could cause anti-stress effects via the inhibition of cortical neuron excitation,” states the study abstract.

L-theanine occurs naturally in tea, especially green tea. However, green tea also contains caffeine unless it is decaffeinated. Suntheanine is not made from green tea, but rather is produced via a patented enzymatic process that mimics the natural process in green tea leaves, resulting in a 100% pure L-isomer-theanine that contains no caffeine.

Of course, stress is the result of many factors and experiences that are unique to each individual. A supplement like Suntheanine may help, but it’s also important to get a good night’s sleep, exercise regularly, and resolve any work and family stresses. Yoga and meditation can also help. There are an increasing number of smartphone apps that can help you relax, meditate and deal with stress.

Stress can impact your health and happiness. Fortunately, there are ways to help reduce and manage stress in your life.

Meet the Experts

  • Derek Timm, PhD, RDN

    Derek Timm, PhD, RDN is more than your typical nutrition expert. In addition to being a registered dietitian nutritionist, Timm has earned a PhD in nutrition science. He is also a Monash University FODMAP-trained dietitian with expertise in how a high FODMAP diet impacts the symptoms of IBS.


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